Cartoon Trivia ANSWERS with Leo & Peri [UPDATE]

Léonin (b. 1150?) was the first known composer; Pérotin (b. 1200?) was the second known composer.

Having known so much, we present Classicalite's Cartoon Trivia with Leo & Peri.

Leo: "Peri, I keep hearing about some modern composer's piece that's somehow indebted to me and my organum. The guy's name is Reich, but I don't know the name of the piece, itself. Any ideas?"

Peri: "Apropos of Mr. Reich's own form of organum, ol' chap, I'll keep my response minimal--Proverb."

Do you know the answer, Classicalites? If so, let us know in the comments. As always, we'll post the right response soon.